<%@ page import="java.util.List" %>
<%@ page import="java.util.ArrayList" %>
<%@ page import="java.sql.Connection" %>
<%@ page import="java.sql.Statement" %>
<%@ page import="java.sql.ResultSet" %>
<%@ page import="java.sql.DriverManager" %><%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2018-3-20
  Time: 15:46
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title></title>
</head>
<body>

<h1>这是一个JSP文件。</h1>


<%
    //判断用户是否登录
    if( session.getAttribute("isLogin")== null);
    //没有登陆就跳转到login.jsp
    response.sendRedirect("login.jsp");

    //out.write("hello,world!");

    //out.write("<h1>hello,world!</h1>");


%>

<style type="text/css">

    table {
        border: 1px solid #000;
        border-collapse: collapse;
    }

    td, th {
        border: 1px solid #000;
        padding: 10px;
    }

</style>


<table>
    <thead>
    <tr>
        <th>编号</th>
        <th>用户名</th>
        <th>密码</th>
    </tr>
    </thead>

    <tbody>


    <%

        class User {
            int id;
            String name;
            String password;

            // alt + insert
            public User(int id, String name, String password) {
                this.id = id;
                this.name = name;
                this.password = password;
            }
        }

//        User chen = new User(1, "chengongsuo", "123456");
//        chen.id = 1;
//        chen.name = "chengongsuo";
//        chen.password = "123456";

        List<User> list = new ArrayList<User>();
//        list.add(new User(1, "chengongsuo", "123456"));
//        list.add(new User(2, "zhen", "123456"));
//        list.add(new User(3, "John", "123456"));
//        list.add(new User(4, "Bob", "123456"));


        // 3 + 1
        Connection connection = null;
        Statement statement = null;
        ResultSet resultSet = null;

        String sql = "select * from t_users";

        Class.forName("com.mysql.jdbc.Driver");

        connection = DriverManager.getConnection(
                "jdbc:mysql://localhost:3306/sctu_javaweb_2018?serverTimezone=UTC",
                "root",
                "113223"
        );

        statement = connection.createStatement();

        resultSet = statement.executeQuery(sql);

        while(resultSet.next()){

            int id = resultSet.getInt(1);
            String username = resultSet.getString(2);
            String password = resultSet.getString(3);

            User user = new User(id, username, password);
            list.add(user);

        }
        resultSet.close();
        statement.close();
        connection.close();



        for (User user : list) {

            out.write("<tr><td>" + user.id + "</td><td>" + user.name
                    + "</td><td>" + user.password + "</td></tr>");
        }
//
//        for (int i = 0; i < 10; i++) {
//            // alt + shift + 向上箭头
//            // ctrl + alt + L
//            out.write("<tr><td>" + i + "</td><td>Jhon</td><td>123</td></tr>");
//        }
    %>


    </tbody>

    <tfoot>
    </tfoot>
</table>

</body>
//加入版权信息
<%@include file = "footer.jsp"%>
</html>
